In late 2002 I finally got around to designing and building the flatbed I had always wanted.  With the sheet metal remove I suddenly had a lot of tire clearance and the 35's looked really small.   Mark Mason came to the rescue again.  He had just received on of the first sets of the DOT approved 37" Baja Claws for a 15" rim.  I hurried home to get the tires mounted for a run the next day.

It's been nearly a year since I mounted the 37's.  I have been running them at 4 psi and the tires conform nicely to the terrain providing a bigger contact patch.  They also hold the bead amazingly well.  

This was a good test of the tires bead holding capability.  The tires are set at 4psi and the weight of the entire rig is supported by the two sidewalls on the passenger side. 

Measuring approximately 36.25" tall @20 psi, the nearly 2" of extra differential clearance over the 35's (measured 32.5" tall) was a big help when navigating boulder fields.  Also, despite these being a harder compound than the competition series, I have been completely satisfied with the 37's grip on rocky surfaces.  Pretty much everything I said about the 35's still holds true with the 37's.  The only weak point I have found with these tires (and the 35's) is wet weather performance.  Throw some water into the mix and all bets are off.  To be fair I haven't really seen any other tire perform well on wet rocks, finesse driving is typically not an option and wheel spin combined with momentum is needed for some obstacles.

As far as durability, the last year put some wear on the tires.  The edges of all the lugs are pretty well rounded, although it was a gradual wearing as opposed to tread chunking.  The height doesn't seem to have changed much, I didn't measure the tread height when new so I can only eyeball it. The sidewall lettering is pretty much unreadable and shows many trail scars.  I continue to be impressed by the puncture resistance of these tires.  In the course of the last year I have seen about every other brand of tire punctured including SX's so the potential for damages was there (just look at the condition of the rims after 1 year). There are a few slices down to the cords but the layer of kevlar below the outer rubber seems to have kept the rocks at bay.  If I had to buy tires again tommorow the only other tire that I would consider would be the competition compound version of these which require a 17" rim.